Gearing.



PATENTED MAY 8, 1906.

H. BAERBALCK.

GEARING.

APPLICATION FILED 1mm, 1905.

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H. BAERBALCK.

GEARING.

APPLICATION FILED APR. 3, 1905.

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No. 820,377. PATENTED MAY 8, 1906. H. BAERBALGK.

GEARING.

APPLICATION FILED APR. 3, 1905.

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ggg .9 f Cm- UNITED STATES PATENT OFFICE.

HANS BAERBALCK, OF HAMILTON, OHIO, ASSIGNOR TO THE HAMILTON MACHINE TOOLCOMPANY, A CORPORATION OF OHIO.

GEARING.

Specification of Letters Patent.

Patented May 8, 1906.

To all whom it may concern:

Be it known that I, HANS BAERBALOK, a citizen of Germany, residing atHamilton, Ohio, have invented a new and useful Improvement in Gearing,of which the following is a specification.

My invention relates to gearing of the class adapted to use inengine-lathes or elsewhere for cutting screws or for other purposes; andthe objects of my improvement are to interpose between the live-spindleand the leadscrew interchangeable systems of gearing havingpredetermined ratios of differentiation to adapt the lathe for cuttingscrewthreads by either the metrical, the English duodecimal, or othersystem, to provide a clutch mechanism within the head stock which isautomatically actuated by the movement of the tool-carriage to eitherstop or reverse the lead-screw, and to provide such compact assemblageand construction of parts as to obtain maximum efficiency and durabilitytogether with facility of operation. These objects are attained in thefollowing-described manner, as illustrated in the accompanying drawings,in which Figure 1 is an end elevation, with parts broken away, of anengine-lathe embodying my improvement; Fig. 2, a transverse section of alathe-bed, showing the speed-chang ing gears therein; Fig. 3, a frontelevation of portions of the live spindle with parts in diametricalsection; Fig. 4, a transverse section of portions of the head-stock,showing the reversing-gears therein; and Fig. 5, the speed changinggears removed from the bed and unfolded in a plane; Fig. 6, a frontelevation, with parts in section, of portions of a lathebed andhead-stock; and Figs. 7 and 8, end

elevations with parts in section, showing different ositions ofengagement of the gears.

In t e drawings, 6 represents the lathebed, 7 the head-stock, 8 thelive-spindle, 9 the lead-screw, 10 the carriage-feed shaft, and 11 thestop-rod, all constructed and arranged in the ordinary manner.

Reversing-gears 12 and 13, each formed with a clutch member, are idlymounted on sliding shaft 14, and clutch member 15, secured on saidshaft, is movable thereby into engagement with either of said gears.Gear 12 engages directly with driving-gear 16 on the live-spindle, andgear 13 is driven in the opposite direction from gear 12 by meansbevel-gears 23, whereby the arm is actuated to move clutch member 15 inor out of engagement with either of the gears 12 or 13,

whereby the rotation of shaft 14 may be dis v continued or reversed.

Gear 24, splined on shaft 14, drives gear 28, secured on shaft 30,through intermediate gears 25, 26, and 27. Said shaft and a similarshaft 29, parallel therewith, are j ournalled in fixed bearings withinthe lathe-bed, and respective series or cones of gears 31 and 32 aresecured thereon with the gears of one series directly opposite tocorresponding gears of the other series. The gears of the respectiveseries being graduated in size to different predetermined ratios, theratio of one series may be based on the decimal and that of the otherseries on the duodecimal system of changes or differentiation.

Frames 33 and 34, provided with shafts 35 and 36 are hinged on therespective shafts 29 and 30. Gears 37 and 38, secured on shafts 29 and30, engage with the respective pinions 39 and 41, secured on thecorresponding shafts 35 and 36. Planet-pinions 42 and 43, splined onshafts 35 and 36, are simultaneously adjustable thereon intoregistration with either gear of the corresponding series 32 or 31 bymeans of brackets 44 and 45, carried by toothed rack 46, terminating incurved shoes 47 and 48 in engagement with opposite sides of therespective pinions. Said rack is mounted in the lathe-bed and movableparallel with shafts 35 and 36 by means of toothed pinion 49, secured onshaft 51, which is journaled in the lathe-bed and provided withcrank-arm- 52. Amovable stop 53, carried by the crankarm, is adapted toengage with either of the holes 54, formed in a fixed contiguousdiskplate 55. Said holes are arranged to register with and engage stop53 when pinions 42 and 43 register with corresponding gears of series 32and 31, whereby they may be maintained in adjusted position.

Frames 33 and 34 are connected together by means of links 56, and arm 57is rigidly? secured to frame 34 by means of sleeve 50, which movablyencircles shaft 30. Said arm serves to turn said frames on theirrespective shafts simultaneously in opposite directions, whereby pinions42 and 43 may be alternately engaged or disengaged with thecorresponding gears of the respective series 32 and ries of holes 59,formed in a fixed contiguous curved plate 61 in registration with thedifferent positions of the pin corresponding with the engagement ofeither of the pinions 42 or 43 with either of the gears of thecorresponding series of gears 32 and 31.

If it is desired, shoe 48 may be provided with an independentrack-and.-pinion adjusting mechanism, and links 56 may be omitted andhousing 33 provided with an independent adjusting-arm 62, as shown indotted lines in Figs. 2 and 5.

In operation the reversing and stopping mechanism being located withinthe headstock near the initial point in the transmission of power to thelead-screw prevents any departure from the synchronous movement of saidscrew with the driving mechanism by the action of said reversingmechanism.

Frames 34 and 33 may be simultaneously turned on their respective shafts30 and 29 by means of arm 57 to cause either of the pinions 43 or 42 toengage with a registering gear in the corresponding series of gears 32or 31, whereby the speed of shaft 29 and of the lead-screw driventhereby may be changed in such different predetermined ratios from theconstant speed of the live-spindle as to enable the same lathe to cutthreads by different systems, as the English or the metric. Thisobviates the necessity for the manufacturer to provide different toolsfor the same purpose and substantially doubles the range of usefulnessfor the same tool and suits it to the export demands of differentcountries.

Having fully described my improvement, what I claim as my invention, anddesire to secure byLetters Patent of the United States, 1s

1. The combination of a pivotally-supported frame, a shaft carriedthereby, means to rotate the shaft, a pinion splined on the shaft, meansto adjust and maintain the pinion longitudinally thereon, a second shaftjournaled in fixed bearings and parallel with said first shaft, a coneof gears secured thereon to turn in unison, and means to move andmaintain said pinion into engagement with shaft, respective secondaryrotative shafts carried thereby In an arc concentric with thecorresponding primary shafts, pinions splined thereon, a rack-and-plnionmechanlsm arranged to simultaneously move and maintain the pinions inthe planes of'the gears on the cones, and a lever mechanism arranged toalternately move and maintain the pinions in engagement with either gearof the opposite cone of gears.

3. The combination of two cones of gears, the gears of each conearranged to turn in unison, two pinions in constant communication withthe respective cones and movable longitudinally in registration with thegears of the opposite cone, and lever mechanism arranged to alternatelyengage said pinions therewith.

4. The combination of a driving and a drivencone of gears, respectivepinions communicating therewith, rack-and-pinion mechanism arranged tosimultaneously move and maintain the pinions longitudinally inregistration with either gear of either cone, and lever mechanismarranged to engage either pinion with the gear of the opposite cone inregistration therewith.

5. The combination of a cone of gears arranged to turn in unison, apivotally-mounted frame, a driven shaft carried thereby parallel withthe axis of the cone, a pinion splined thereon, means to move andmaintain the pinion longitudinally in registration with either gear ofthe cone, and lever mechanism arranged to move the frame with the.pinion in engagement with said gear.

6. The combination of parallel rotative shafts, respective series ofgears. secured thereon, each series being graduated in size to adifferent predetermined ratio from the other, a frame hinged on eachshaft, respective pinions carried thereby and movable into engagementwith the respective gears of the "opposite series.

7. The combination of parallel rotative shafts, respective cones ofgears secured thereon, frames hinged on the respective shafts,corresponding pinions thereon engaging with the respective shafts, meansarranged to move and maintain the pinions in registration with eithergear of the cones, and lever mechanisms arranged to move and maintaineither pinion in engagement with either gear on the opposite shaft.

8. The combination of driven cone of gears, aprimary shaft journaledparallel with the axis thereof in fixed bearings, a frame pivotallymounted thereon, a secondary shaft carried thereby, gears communicatingtherel'IO with and with the primary shaft, a pinion splined and movablelongitudinally on the secondary shaft in registration with either gearof the cone of gears, and lever mechanism arranged to move and maintainthe frame With the pinion in engagement With said gear.

9. The combination of a driven gear, tWo series of driving-gears, thegears of each series being differentiated in size in a ratio differentfrom those of the other series, and appropriate mechanism arranged tocommunicate motion from either gear of either series to said drivengear.

10. The combination of a driving and a driven series of gears eachgraduated in size to a different ratio, the gears of each seriesarranged to turn in unison, pinions communieating with the respectiveseries and movable longitudinally in registration with either gear ofthe opposite series, and lever mechanism arranged to move and maintainsaid pinions alternately in engagement With corresponding gears in therespective opposite serles.

HANS BAERBALOK.

Witnesses ARTHUR T. LETHERBY, R. S. CARR.

